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2122 Blöockling javascript urls

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This commit is contained in:
Knut Sveidqvist
2021-06-08 20:08:04 +02:00
parent 26ede9b015
commit 3d22fa5d24
3 changed files with 108 additions and 0 deletions
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5
cypress/integration/other/xss.spec.js
View File

@@ -58,5 +58,10 @@ describe('XSS', () => {
cy.wait(1000); cy.wait(1000);
cy.get('#the-malware').should('not.exist'); cy.get('#the-malware').should('not.exist');
}) })
it('should not allow maniplulating antiscript to run javascript', () => {
cy.visit('http://localhost:9000/xss5.html');
cy.wait(1000);
cy.get('#the-malware').should('not.exist');
})
}) })

99
cypress/platform/xss5.html Normal file
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@@ -0,0 +1,99 @@
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Montserrat&display=swap"
rel="stylesheet"
/>
<link href="https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css" rel="stylesheet">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<link href="https://fonts.googleapis.com/css?family=Noto+Sans+SC&display=swap" rel="stylesheet">
<style>
body {
/* background: rgb(221, 208, 208); */
/* background:#333; */
font-family: 'Arial';
/* font-size: 18px !important; */
}
h1 { color: grey;}
.mermaid2 {
display: none;
}
.mermaid svg {
/* font-size: 18px !important; */
}
.malware {
position: fixed;
bottom:0;
left:0;
right:0;
height: 150px;
background: red;
color: black;
display: flex;
display: flex;
justify-content: center;
align-items: center;
font-family: monospace;
font-size: 72px;
}
</style>
</head>
<body>
<div>Security check</div>
<div class="flex">
<div id="diagram" class="mermaid"></div>
<div id="res" class=""></div>
<script src="./mermaid.js"></script>
<script>
mermaid.parseError = function (err, hash) {
// console.error('Mermaid error: ', err);
};
mermaid.initialize({
theme: 'forest',
arrowMarkerAbsolute: true,
// themeCSS: '.edgePath .path {stroke: red;} .arrowheadPath {fill: red;}',
logLevel: 0,
state: {
defaultRenderer: 'dagre-wrapper',
},
flowchart: {
// defaultRenderer: 'dagre-wrapper',
nodeSpacing: 10, curve: 'cardinal', htmlLabels: true
},
htmlLabels: true,
// gantt: { axisFormat: '%m/%d/%Y' },
sequence: { actorFontFamily: 'courier',actorMargin: 50, showSequenceNumbers: false },
// sequenceDiagram: { actorMargin: 300 } // deprecated
// fontFamily: '"times", sans-serif',
// fontFamily: 'courier',
fontSize: 18,
curve: 'basis',
securityLevel: 'antiscript',
startOnLoad: false,
secure: ['secure', 'securityLevel', 'startOnLoad', 'maxTextSize']
// themeVariables: {relationLabelColor: 'red'}
});
function callback(){alert('It worked');}
function xssAttack(){
const div = document.createElement('div')
div.id = 'the-malware'
div.className = 'malware'
div.innerHTML = 'XSS Succeeded'
document.getElementsByTagName('body')[0].appendChild(div);
throw new Error('XSS Succeded');
}
var diagram = "graph LR\n";
diagram += "B-->D\(\"<img onerror=location=\`java";
// diagram += "script\u003aalert\u0028document.domain\u0029\` src=x>\"\);\n";
diagram += "script\x3a;xssAttack\u0028\u0029\` src=x>\"\);\n";
console.log(diagram);
// document.querySelector('#diagram').innerHTML = diagram;
mermaid.render('diagram', diagram, (res) => {
console.log(res);
document.querySelector('#res').innerHTML = res;
});
</script>
</body>
</html>

4
src/diagrams/common/common.js
View File

@@ -26,6 +26,10 @@ export const removeScript = txt => {
break; break;
} }
} }
rs = rs.replace('javascript:', '#');
rs = rs.replace('<iframe', '');
return rs; return rs;
}; };